<!-- 主页只有登陆才能访问，路由导航守卫控制权限 -->
<template>
    <el-container class="home-container">
         <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="" >
                <span>后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主题 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区 -->
                 <el-menu background-color="#373C41" text-color="#fff" active-text-color="#409Eff" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单模板 -->
                        <template slot="title">
                            <!-- 图表 -->
                        <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                        <span>{{ item.authName }}</span>
                        </template>
                        <!-- 二级菜单 -->
                    <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                        <template slot="title">
                        <i class="el-icon-menu"></i>
                        <span>{{ subItem.authName }}</span>
                        </template>
                    </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧主题区 -->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  data () {
    return {
      menulist: [],
      iconsObj: {
        125: 'el-icon-s-custom',
        103: 'el-icon-s-help',
        101: 'el-icon-s-goods',
        102: 'el-icon-s-order',
        145: 'el-icon-s-data'
      },
      //   是否折叠
      isCollapse: false,
      //   动态激活的地址
      activePath: ''
    }
  },
  methods: {
    //   退出、清空浏览器token
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      // 获取所有菜单
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error()
      this.menulist = res.data
      console.log(res)
    },
    toggleCollapse () {
      // 点击展开、收回菜单
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang='less' scoped>
.home-container {
    height: 100%;
}
.el-header {
    background-color: #373C41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #323744;
    .el-menu {
        border-right: 0;
    }
}
.el-main {
    background-color: #eaedf1;
}
.toggle-button {
    background-color: #323744;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
